Adjustable propeller.



F. HARLOW.'

ADJ USTABLB PROPELLBR. APPLIoATIoN FILED mso. 1, 1910.

1,019,635. Patented Mahr. 5, 1912.

INVENTUR Frank Harlow l To 'wwm 'it may concern:

rmx naamw, or Bosma Massacnvsaras. ADJUSTABLE PBOPELLER.

Specification of Letters Patent.

Patented Mar. 5, 1912.

Application and December 1, 1910. serial ng. saspaa.

Be it known that I,v FRANK HAnLow, a citizen of the United States, and aresident of Boston, in the county of Suffolk and State of Massachusetts,have invented a new and Improved Adjustable Propeller, of which thefollowing is a ful1,'clear, and exact description.

My invention relates to adjustable propellers-that is, to propellershaving an axis of rotation which may at will ybe extended to differentangles. f'

My invention comprehends more particularly an adjustable propellersuitable vfor use upon airshlps, other types of mechanism in which it isdesirable that the operator, by afvery simple movement, may be able toshift the axis of the propeller quickly and effectively from one angleto another.

My inventionl comprehends means whereby the axis of the ropeller may atwill be directed into an infinite number of angular positions-thepropeller being in fact capable of being turned in practically anydirection.

Reference is to be had to the accompanying drawings forming a part ofthis specication, in which similar characters of reference indicate thefigures.

Figure 1 is a side elevation showinglmyadjustable propeller complete;Fig. 2 is a de-4 tail showing in enlarged section the various operableparts used peller and the shaft Fig. 3 is a detail showing the bearingsupporting a portion of the propeller shaft..

Mounted upon a floor 4 is a pedestal 5 provided wi'th a cup-like portion6. A barrel 7 rests in this cup-like port-ion which. serves as a bearingfor the barrel. A pulley 8 is mounted rigidly upon the barrel 7 and forthis purpose is provided with a hub 9 having a comparativelylargebearing surface fitting tightly u on the barrel. The barrel 7 isprovided wit two slots 10 extending in the general directionfof itslength.

At 11 is a shaft which extends entirel through the barrel. Encirclinglthis shafit and dlsposed partially within -the barrel 7 is asleeve 12provided with a threaded portion 13. This sleeeve extends .through thepedestal 5 and also through an Ilopenmg 14 1n the floor 4.

At 15 is a wheel which is mounted rigidly 'carrying with flying machinesand various corresponding parts in all 4 29 may have a fOr handling thepro- Carrying the same; afnd I or.

upen the lower end of used for turnin`g this -sl AAt i1'6 is a miter.rigidly upon the lower end ofthe vertical shaft 11. A ring 17 isthreaded internally and fitted upon the threaded portion 13 of thesleeve 1,2, this ring lbeing provided with trunnions 18 extending inopposite directions from it.

provided with holes 19l through `which the trunnions 18 extend. Wheneverthe sleeve 12 is turned the ring 17 moves up or down it the annularbearing 19.

Mounted rigidly ,upon the upper end .of the shaft llisamlter gear 20. Acollar 21 encircles the upper portion of the barrel 7. Intregal withthis collar and extending obliquely upward therefrom is an arm 22, theupper end of which is fashioned into a bearing 23. At A.24 is a. mitergear which works upon a Shaft 25, the latter being provided with areduced portion extending through the bearing 23.

At 26 is a universal joint by aid whereof a shaft 27 is connected withthe shaft 25.

Connected with the annular bearing 19 andextending outwardly ltherefromis 4an arm 28. An annular bearing 29 is connected At 19 is an annularbearing .whichl is with 'the upper .end of this arm by aid of a p1v.otpin 30, so that :the annular bearin rocking movement relatively to theupper end of the arm.

At 31 are propeller blades which are secured upon the outer or free endof the Shaft 27. Meshing with the miter gear 16 is another miterV gear32 which is mounted lirmly upon a revoluble shaft 33, the latter beingparallel with and below the fioor 4, and su ported by' a hanger 34depending from t e floor.'

The operation 'of m Power, being applic device is as follows: to theshaft A33,- is

transmitted through the gear pinions 32, 16.

to the shaft 11 and thence through the gear pinions 20, 24, shaft 25,universal joint 26 and shaft 27 to the propeller blades 31, so that theyrevolve continuously. If, now, the gear wheel 15 be turned, it rotatesthe sleeve l2 and the threaded causes the ring v17 to move up or downac- .cording to the direction of rotation of the sleeve. This causes thebearing 19 to' move up or down and in so doing changes the verportion 13of this sleeve tical angle of the shaft 27. rPhat is to say, v

- 2., Atonneau' y ,l l l the Ishaft moving upon the universal joint allyconnected with it, a shaft extending l as a center is, at its outerend,raised or low-v ,through saidlastmentonedbearing an ered so that thepropeller is .directed todifmade 1n separate 'partsconnected together 45ferent vertical an les according tothe deby a universal ]'0int, a gearmember carried 5 gree of rotation o the wheel 15. Again, if by saidlast-mentioned' shaft, and meshing.,`

thegpulley 8 be turned, it carries with it the with saidlfirsts-mentioned gear member,y and barrel 7, and in'so doingcauses-thebearing two propellers` mountednponone of said v 19 andarm's 28, 22 toturn upon a vertical separate-partsconnec'ted together by said 50 laxis. A This causes the propeller .shaft 27 toV universal Joint.r`

o 10 be shiftedv around in a horizont-a plane, as2.1'I`hecombi`nation.ofa barrel provided-- s '25 cial means for shiftingthe shaft 27 to differ# sleeve, a shaft extending through said bar--will be understood by contrasting the kfull with a slot, means forturning said barrel,

and dotted lines in Fig. 1. -The operator, by a revoluble sleeve mountedwithin said barmerely causing the rotation of the `wheel rel andprovided with a .thread mechanism 55 or the pulley 8, or both of them,can shift for turning said sleeve, a ringv provided 1nl12S the propellerto almost any desired angle, ternally with a thread 'and operativelyitted and this ycan be donecwithout any cessation upon saidsIeeVe, saidring being `provided of 'the power as transmittedr through the with atrunnion extending through said slot gearing to the propeller blades.The result in said barrel, an annular bushing encircling 60 is that thepropeller -may be" shifted 'to difsaid barrel and engaging saidtrunniomsaid ferent angles while turning. This renders bushing servingas a`bearingwhich is slidthe device of peculiar-value in connection.able relative to said-barrel, an arm connect- V with airships and flyingmachines. ed with said bushing and adapted to be I do not limit' myselr`to the particular raised and lowered as said' bushing is raised 65construction herein shown, nor to any'speand lowered during therotation-'lof said ent angles relativelyto other. parts. Neither rel'and through said sleeve, a gear wheel do I limit m self in allinstancesio the armounted upon said ring, a second gear wheelrangement/,o the various fixed and movable engaging said first-mentionedgear wheel, 70

parts as herein shown, the scope of my in- -and a shaft made in two`parts connected -vention being commensurate with my claims. together bya universal joint, one of said Having thus described my invention, Iparts being lconnected with said secondclaim as new and desire to secureby Letters mentioned gear wheel,the other of said parts Patent:` n ,sengaging said second-mentioned bearing 75 1.' The combination of abarrel, a pulley carried by said arm, and a propellermountmountedfixedly thereupon'for turning said ed upon said last-mentioned part.

barrel, a shaft extending axially through c In testimon whereof I havesigned my said barrel, and through said pulley, a gear name to thisspeciication in the presenceof member mounted upon said shaft forturntwo subscribing witnesses.

, ing the latter continuously, an arm provided FRANK HARLOW.

40 with a bearing, said bearing being slidably Witnesses: v

' .mounted upon said barrel, said arm being FRANK E. WRIGHT, Sr.,

also 'provided with a second bearing pivot` FRANK E. WRIGHT, Jr.

